CVE-2020-14372

A flaw was found in grub2 in versions prior to 2.06, where it incorrectly
enables the usage of the ACPI command when Secure Boot is enabled. This
flaw allows an attacker with privileged access to craft a Secondary System
Description Table (SSDT) containing code to overwrite the Linux kernel
lockdown variable content directly into memory. The table is further loaded
and executed by the kernel, defeating its Secure Boot lockdown and allowing
the attacker to load unsigned code. The highest threat from this
vulnerability is to data confidentiality and integrity, as well as system
availability.

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